How does an enzyme affect the rate of a reaction?

  • A It lowers the activation energy of the reaction, increasing the reaction rate.
  • B It raises the activation energy of the reaction, decreasing the reaction rate.
  • C It lowers the activation energy of the reaction, decreasing the reaction rate.
  • D It raises the activation energy of the reaction, increasing the reaction rate.
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The correct answer is A. It lowers the activation energy of the reaction, increasing the reaction rate.

Enzymes lower the activation energy of a reaction, increasing the reaction rate.

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